JP2008175777A - Vehicle crash simulator system with inertial moment determination function and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a separate device for measuring the center of gravity or the like is required in a conventional vehicle crash test apparatus. <P>SOLUTION: The vehicle crash simulator system includes: a pitching table on which the body to be tested is mounted and which is swingable in a pitching direction; a load cell unit with a spring and a load cell unit which can be interposed between the body to be tested and the pitching table; a horizontal acceleration control/measurement device applying horizontal acceleration to the pitching table; a pitching control/measurement device swinging the pitching table in the pitching direction; and a simulation control device calculating the mass, the position of the center of gravity, and the pitching inertial moment and reproducing the crash motion of the vehicle. Accordingly, measurement of the mass, the position of the center of gravity, and the inertial moment of the body to be tested and the simulation of the vehicle crash test are achieved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention identifies data such as the mass, center of gravity, and moment of inertia of a vehicle, particularly a white body, and uses the identified data to decelerate the vehicle with a waveform at the time of actual collision, thereby preventing vehicle collision without damage. The present invention relates to a vehicle collision simulation apparatus and method with an inertia moment identification function for performing a test.

  The applicant of the present application, for example, accurately reproduces a collision test of a safety device such as an air bag without destroying the vehicle, for example, a slide base arranged movably along a guide rail, and an upper part of the slide base A mounting base for mounting the actual vehicle, six vehicle attitude control cylinders that connect the sliding base and the mounting base and drive the mounting base in six degrees of freedom, and one end of the guide rail In Japanese Patent Application No. 2005-306702, a vehicle collision test apparatus provided with a hydraulic cylinder rack drive device for extrusion which is arranged in the above and pushes the slide rack is proposed.

  In order to accurately control and reproduce the traveling direction acceleration, pitch rotation angle, and vertical displacement amount of the actual vehicle according to the target waveform obtained from the vehicle collision test result using the vehicle collision test apparatus described above, this actual vehicle It is necessary to obtain the mass, the center of gravity, the moment of inertia, etc. in advance and input them to the arithmetic processing unit before the vehicle collision test.

  On the other hand, in order to provide a method for measuring the center of gravity of a vehicle body that can measure the center of gravity position and the moment of inertia of a four-wheeled vehicle using a small and lightweight device, A measurement preparation step of locking the suspension and attaching the wheel adapter to each axle, and a first measurement step of measuring the distance from the reference point by arranging the adapter tip portions of the four axles on the same horizontal plane; A second measuring step for measuring the load of the vehicle body applied to the tip of each adapter, and the entire vehicle body is inclined with the diagonal line of the vehicle body as a reference axis in succession to the first and second steps, A third measuring step for measuring the load and inclination angle of the vehicle body applied to the adapter tip, a center-of-gravity position calculating step for calculating the three-dimensional center of gravity position of the vehicle body from the measurement data in each measurement step, and an inertial mode. men Vehicle body gravity center position such measuring method and a calculation step has been proposed (e.g., Patent Document 1).

  And a first support member that lifts the measurement table at the time of measuring the moment of inertia in the pitch direction, sets the center of rotation, and separates from the measurement table at the time of non-measurement of the moment of inertia in the pitch direction. And a second support member that lifts the measuring table when measuring the moment of inertia in the roll direction, sets the center of rotation, and separates from the measuring table when the moment of inertia in the roll direction is not measured. Has been proposed (for example, Patent Document 2).

In order to make the vehicle collision test accurately reproduce the actual vehicle, the vehicle (the actual vehicle or the white body) is mounted on the measuring device described in Patent Documents 1 and 2, and the center of gravity and inertia are obtained. After calculating the moment, it is necessary to transfer to the vehicle collision test apparatus proposed in Japanese Patent Application No. 2005-306702 and perform a collision test.
In this case, not only the vehicle collision test apparatus but also a center of gravity position measuring apparatus or an inertia moment measuring apparatus as described in Patent Document 1 or Patent Document 2 is required, which not only increases the equipment cost but also makes the test complicated. There is a problem of becoming.
Moreover, the measuring device described in Patent Document 1 or Patent Document 2 has a complicated structure. If this measuring device is mounted on a vehicle collision test device and the position of the center of gravity or moment of inertia is measured, the vehicle is used as it is. When performing a crash test, this measuring device cannot withstand the impact during the vehicle crash test and is likely to break.

Usually, the test body is often a cut model of a vehicle (white body), and the white body is processed and changed at a vehicle collision test site or the like. Or there is a problem that it takes time for advance preparation and the like because it has to be transported to a place where the inertia moment measurement device is located and measured again.
In addition, after measuring the mass, the position of the center of gravity, or the moment of inertia with an apparatus for measuring the position of the center of gravity or an inertia moment measuring device in advance for an actual vehicle or the like, Unlike the tires and suspensions, there is a problem that the adjustment accuracy is reduced.

JP-A-6-265433 Japanese Patent No. 3142444

  The present invention has been proposed in order to solve the above-described problems, and is an inertia that can measure the mass, center of gravity or moment of inertia of a test body, particularly a white body, and perform a vehicle collision test with a single device. An object of the present invention is to provide a vehicle collision simulation apparatus and method with a moment identification function.

  The present invention has been made to solve the above-described conventional problems, and each invention described in the claims employs the following means as a vehicle collision simulation apparatus and method with an inertia moment identification function, respectively. It is a thing.

(1) The vehicle collision simulation apparatus with inertia moment identification function of the first means is:
A pitching table mounted with a test body and swingable in the pitch direction;
A load cell unit with a spring and a load cell unit that can be interposed between the test body and the pitching table;
A horizontal acceleration control / measurement device for applying a horizontal acceleration to the pitching table;
A pitching control / measurement device that swings the pitching table in the pitch direction;
A simulation control device for transmitting a control signal to the horizontal acceleration control / measurement device and the pitching control / measurement device,
The simulation control device includes:
When the moment of inertia is identified, the test body is based on the load cell unit with spring and the load measurement value measured by the load cell unit by swinging the pitching table in the tilt and pitch directions via the pitching control / measurement device. Calculate the mass, center of gravity position and pitching moment of inertia of
During a vehicle collision test, a horizontal input waveform and a pitching input waveform are calculated based on a target waveform, the mass, the gravity center position, and the pitching inertia moment, and the horizontal input waveform is output to the horizontal acceleration control / measurement device, The pitching input waveform is output to the pitching control / measurement device.

(2) The vehicle collision simulation apparatus with inertia moment identification function of the second means is the first means,
A signal for swinging the pitching table in the pitch direction when the moment of inertia is identified is a single pulse waveform.

(3) The vehicle collision simulation apparatus with inertia moment identification function of the third means is the first or second means,
The pitching table is provided on a slide base that is movably disposed along a guide rail so as to be pitchable.

(4) The fourth means of inertia moment identification method is:
Using a vehicle collision simulation apparatus provided with a pitching table on which a test specimen is mounted and provided on a slide base movably disposed along a guide rail so as to be swingable in the pitch direction.
Inserting a load cell unit with a spring and the load cell unit between the pitching table and the test body,
Calculate the mass and center of gravity position of the specimen based on the load measurement value measured by the load cell unit with spring and the load cell unit by horizontally and tilting the pitching table,
The pitching inertia moment is calculated based on a load measurement value measured by the spring loaded cell unit by swinging the pitching table.

(5) The simulation method of the fifth means is
A guide rail and a slide base movably disposed along the guide rail;
A pitching table provided on the slide base so as to be swingable in the pitch direction and on which a test body is mounted,
A load cell unit with a spring and a load cell unit that can be interposed between the test body and the pitching table;
A horizontal acceleration control / measurement device for applying a horizontal acceleration to the pitching table;
A pitching control / measurement device that swings the pitching table in the pitch direction;
A simulation control device for transmitting a control signal to the horizontal acceleration control / measurement device and the pitching control / measurement device,
The slide base is slidably mounted on the guide rail,
Fixing the load cell unit with spring and the load cell unit on the pitching table;
Fixing the test body on the load cell unit with spring and the load cell unit;
Calculate the mass of the test body based on the load measurement value measured by the load cell unit with the spring and the load cell unit with the pitching table horizontal,
Inclining the pitching table to calculate the center of gravity position of the specimen based on the load measurement value measured by the load cell unit with a spring and the load cell unit,
A pitching inertia moment is calculated based on the load measurement value measured by the load cell unit with a spring and the mass and the position of the center of gravity by adding vibration of a single pulse waveform to the pitching table and swinging in the pitch direction.
Thereafter, the load cell unit with spring and the load cell unit are removed, and the test body is fixed on the pitching table,
A vehicle collision test is performed by sliding the pitching table on which the test body is mounted and the slide base along the guide rail.

  The vehicle collision simulation apparatus and method with inertia moment identification function of the invention according to each claim described in the claims employs the above-described means, and thus has the following effects.

  A dedicated measurement device for measuring the mass of the white body, the position of the center of gravity and the moment of inertia of pitching is not required, and a load cell unit with a spring between the pitching table and the white body and a simulation device that performs a vehicle collision test The mass, the position of the center of gravity, and the pitching moment of inertia can be measured and calculated simply by inserting a load cell unit. Become.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic diagram of a vehicle collision simulation apparatus with an inertia moment identification function according to a first embodiment of the present invention, FIG. 2 is a side view of a load cell unit with a spring and the load cell unit in FIG. 1, and FIG. 2 is a side view of another example of a load cell unit with a spring and a load cell unit in FIG.

The vehicle collision simulation apparatus with moment of inertia identification function according to the first embodiment of the present invention has a white body 1 (only the vehicle compartment structure cut out) on the upper surface of the pitching table 2 of the frame structure as shown in FIG. A test body such as a vehicle structure that does not have an engine, a tire, or a suspension) is firmly fixed with a large number of bolts.
And, in order to reproduce the same acceleration and pitch angle as in the actual vehicle crash test nondestructively, the pitching table 2 and the white body 1 etc. are fired in the direction of the rear side of the vehicle by the horizontal acceleration control / measurement device 6, A pitching angle and vertical displacement are given by the pitching control / measurement device 5.

A dummy doll (not shown) sits in the white body 1 (test body), and the number of sensor outputs embedded in the dummy doll is calculated to determine the degree of injury at the time of collision.
In the vehicle collision simulation apparatus with the inertia moment identification function according to the first embodiment of the present invention, the occupant protection devices such as seats, seat belts, and airbags that reduce the degree of collision injury are effectively operated during an actual collision. It is used for short-term (cheap) development.

  In addition, the vehicle collision simulation apparatus with a moment of inertia identification function according to the first embodiment of the present invention is freely movable along the guide rail, similar to that described in Japanese Patent Application No. 2005-306702 filed by the applicant of the present application. Connect the slide mount and the mounting stand (pitching table 2), the mounting stand (pitching table 2) on which the vehicle (white body 1) is mounted, and the slide mount placed on the slide base 6 vehicle attitude control cylinders for driving the mounting platform (pitching table 2) with 6 degrees of freedom, and 6 vehicle attitude control cylinders mounted on the slide frame and connected via remote on-off valves A hydraulic oil pressure storage tank, a braking device for braking the slide base, a base drive device (horizontal acceleration control / measurement device 6) for moving the slide base along the guide rail, Braking device based on the force by operating conditions, gantry driving unit, and a control unit for controlling the remote-off valve (simulation controller 7).

In this case, the six vehicle attitude control cylinders, the remote on-off valve, the hydraulic oil pressure storage tank, and other measurement devices correspond to the pitching control / measurement device 5.
The pitching table 2 does not necessarily have to be driven with six degrees of freedom. Instead of the six vehicle attitude control cylinders, a hydraulic cylinder for raising and lowering (pitching) is provided only behind or in front of the pitching table 2, The pitching table 2 may be swung only in the pitch direction (one degree of freedom).
Thus, the driving of the pitching table 2 can employ one having one to six degrees of freedom as required.

The gantry driving device (horizontal acceleration control / measuring device 6) includes a driving pulley that is rotated by a traveling motor, a driven pulley, and a pulling wire that is wound around the driving pulley and the driven pulley and is connected to the sliding gantry. Can be.
Alternatively, the gantry driving device (horizontal acceleration control / measurement device 6) includes an extruding hydraulic cylinder that is disposed at one end of the guide rail and extrudes the sliding gantry, and an oil tank and a pump unit that supply hydraulic oil to the extruding hydraulic cylinder. Can be provided.

When identifying the moment of inertia or the like, two spring-loaded load cell units 3 and two load cell units 4a and 4b are inserted near the four corners of the white body 1 between the white body 1 and the pitching table 2. It is like that.
As shown in FIGS. 2A and 3A, for example, the spring loaded cell unit 3 includes an upper pedestal 10 and a lower pedestal 11 positioned between the upper pedestal 10 and the lower pedestal 11. The load cell 12 and the compression spring 13 are attached to each other.

As shown in FIG. 2B, the load cell unit 4a includes an upper pedestal 10 and a lower pedestal 11 that are positioned above and below, a load cell 12 and a compression spring 13 that are attached between the upper pedestal 10 and the lower pedestal 11. , A square-shaped lock ring 16 for effecting or killing the compression spring 13 (becomes a fixed length rigid spring), and one end of the lock ring 16 to the upper base 10 (or the lower base 11), The lock ring 16 is configured by a lock ring support metal 15 to which the lock ring 16 is pivotably fixed, and a lock ring metal object 14 for locking the other end of the lock ring 16 to the lower base 11 (or the upper base 10).
Alternatively, the load cell unit 4b includes a lower pedestal 11, a load cell 12 attached on the lower pedestal 11, and a truncated cone 17 attached on the load cell 12, as shown in FIG. Yes.

  The simulation control device 7 includes a display, a storage, a computing unit (CPU), etc., receives and stores load measurement values (output waveform data) from the four load cells 12, and outputs these output waveform data. Analyzes etc. The analysis software includes a set of FFT (Fast Fourier Transform) software.

Next, the moment of inertia identification and vehicle collision simulation process (procedure, calculation) according to the first embodiment of the present invention will be described.
When the vehicle collision test is performed using the white body 1, the movement of the white body 1 according to the target waveform obtained from the actual vehicle collision test (usually, three degrees of freedom of longitudinal acceleration in the floor direction, pitching angle, and vertical displacement). The test body inertial data of the white body 1 is required for accurate control and reproduction, and for checking and confirming prior performance, function, and accuracy.
This specimen inertia data refers to the following three physical quantities.
White body 1 mass: M
Position of the center of gravity G of the white body 1 (front horizontal distance from the load cell units 4a, 4b to the center of gravity G: Lf, rear horizontal distance from the load cell unit 3 with spring to the center of gravity G: Lr, height from the floor bottom surface to the center of gravity G : H)
Pitching moment of inertia around the center of gravity G of the white body 1: I
The load cell distance L from the load cell unit 4a (4b) to the spring loaded cell unit 3 is the front horizontal distance Lf + the rear horizontal distance Lr.

(1) moment of inertia identification step;
First, each physical quantity is identified by the following steps (procedures and calculations).
This moment of inertia identification step includes the white body 1, the pitching table 2, the load cell unit 3 with spring, the load cell unit 4a (4b), the pitching control / measurement device 5 and the simulation control device 7 in the one shown in FIG. And executed as shown in the solid line.

(1-1) Mounting of the load cell unit 3 with spring and the load cell units 4a and 4b;
Load cell units 3 with springs are arranged at two places on the right and left sides of the rear side that support the white body 1 on the pitching table 2, and load cell units 4a (4b) are arranged at two places on the left and right sides of the front side. Secure with.
This position is set to four positions that are four corners of the rectangle when viewed from above.
In addition, when arrange | positioning the load cell unit 4a with the lock ring 16, the lock ring 16 is made into a removal state.
Further, the horizontal distance L between the load cell unit 3 with spring and the load cell unit 4a (4b) is measured (or the load cell unit 3 with spring and the load cell unit 4a (4b) are arranged so as to be the horizontal distance L).

(1-2) Setting the white body 1 to the pitching table 2;
The white body 1 is mounted on the load cell unit 3 with a spring and the load cell unit 4a (4b) on the horizontal pitching table 2, and is fixed with bolts or the like as necessary.
At this time, for safety, the white body 1 and the pitching table 2 may be restrained loosely to some extent by a tension rod (not shown).

(1-3) Setting of the white body 1 and the pitching table 2;
The pitching table 2 on which the white body 1 is mounted is placed on a guide rail (not shown) and moved to a collision test start position in the vicinity of a gantry driving device (not shown).

(1-4) Identification of the mass M, the front horizontal distance Lf, and the rear horizontal distance Lr of the white body 1;
The pitching table 2 is left in a horizontal state.
Thereafter, each load is measured by each load cell 12 of the spring-loaded load cell unit 3 at two places on the left and right sides of the rear side, and each measured load value is transmitted to the simulation control device 7 via the pitching control / measurement device 5. The
In the simulation control device 7, these two load measurement values are summed to calculate the rear load measurement value Fr.
Also, each load cell 12 of the load cell unit 4a (4b) at the front left and right two places measures each load, and each measured load value is transmitted to the simulation control device 7 via the pitching control / measurement device 5. The
In the simulation control device 7, these two load measurement values are summed to calculate the forward load measurement value Ff.

Then, in the simulation control device 7, the mass M, the front horizontal distance Lf, and the rear horizontal distance Lr are calculated (identified) by the following equations based on the load cell distance L, the rear load measurement value Fr, and the front load measurement value Ff. .
Mg = (Ff + Fr) (Formula 1)
Lf = L × Fr / (Ff + Fr) (Formula 2)
Lr = L−Lf (Formula 3)
However, g is a gravitational acceleration (9.8 m / s2).

(1-5) Identification of the center of gravity height H of the center of gravity G of the white body 1;
After the mass M, the front horizontal distance Lf, and the rear horizontal distance Lr are identified, the pitching table 2 is tilted forward at an arbitrary tilt angle θ (about 5 ° to 10 °) and left as it is.
Thereafter, each load is measured by each load cell 12 of the spring-loaded load cell unit 3 at two places on the left and right sides of the rear side, and each measured load value is transmitted to the simulation control device 7 via the pitching control / measurement device 5. The
In the simulation control device 7, these two load measurement values are summed to calculate the tilt rear load measurement value Fri.
Further, each load cell 12 of the load cell units 4 a (4 b) at the front left and right two locations measures each load and transmits it to the simulation control device 7 via the pitching control / measurement device 5.
In the simulation control device 7, these two loads are summed to calculate the forward load measurement value Ffi at the time of inclination. Note that the inclination angle θ of the pitching table 2 is measured by the pitching control / measurement device 5.

Then, in the simulation control device 7, the center of gravity height is calculated based on the following equation based on the tilt rear load measurement value Fri, the tilt front load measurement value Ffi, the mass M, the front horizontal distance Lf, the rear horizontal distance Lr, and the tilt angle θ. H is calculated.
H = (Lf × Ffi−Lr × Fri) / (Mg × sin θ) (Formula 4)
In addition, in order to reduce the variation error in the test and measurement, the average value of the plurality of center-of-gravity heights H obtained by changing the tilt angle θ within a possible range of −10 ° to 10 ° and changing the tilt angle θ several times. May be adopted.

(1-6) Identification of the pitching moment of inertia I around the center of gravity G of the white body 1;
Next, the pitching table 2 is placed in a horizontal state again.
In the case of the load cell unit 4a having the lock ring 16, the lock ring 16 is put on.
In this way, the degree of freedom of movement of the white body 1 is set to one degree of freedom of pitching rotation around the upper end of the load cell unit 4a (4b).

Next, in response to a command from the simulation control device 7, the pitching table 2 is tilted at a predetermined small pitch angle via the pitching control / measurement device 5 and then immediately returned to the horizontal state.
As a result, a single-pulse excitation force is applied to the white body 1 mounted on the pitching table 2 via the compression spring 13.
Then, the white body 1 starts free vibration of pitching rotation and eventually attenuates and stops.
The excitation force applied to the white body 1 should be a single pulse.
If a plurality of pulses are added, if the vibration period of the white body 1 and the period of the plurality of pulses do not match (highly likely), there is a high possibility that free vibration will be inhibited.

During this free vibration, the total load measurement value of the output of the load cell 12 of the two left and right spring loaded cell units 3 is recorded as a time history (waveform) in the memory of the simulation control device 7 or the like.
In the simulation control device 7, the linear free vibration is clearly removed from the waveform by removing the transient vibration part corresponding to the first single pulse input and the non-linear vibration part such as the close contact of the compression spring 13 and the tension exceeding the free length. An FFT (Fast Fourier Transform) operation is performed on the portion.
As a result, the abscissa ωn (natural circular frequency, unit rad / sec) of the point that becomes the first peak is obtained.

That is, there is the following relationship between the natural frequency fn (unit: Hz) and the natural period T (unit: sec).
ωn = 2πfn (Formula 5)
T = 1 / fn (Formula 6)

Based on the natural circular frequency ωn at the time of free pitching vibration of the white body 1 obtained in this way, the mass M, the front horizontal distance Lf, the rear horizontal distance Lr, and the center of gravity height H calculated by Expressions 1 to 4. In the simulation control device 7, the pitching inertia moment I around the gravity center G of the white body 1 is calculated by the following equation.
I = (K × L ² −Mg × H) / ωn ² −M × (Lr ² + H ² ) (Formula 7)

Here, K is the total equivalent spring constant of the load cell 12 of the left and right two spring-loaded load cell units 3.
The value of the total equivalent spring constant K can be obtained in advance from the force-deformation curve for the assembly of the load cell unit 3 with a spring shown in FIGS.
In addition, using a white body 1 with known inertia data such as mass M, front horizontal distance Lf, rear horizontal distance Lr, center of gravity height H, and pitching inertia moment I, the pitching inertia moment around the center of gravity G of the white body 1 I is identified, and a more realistic total equivalent spring constant K that reflects the rigidity effect of the white body 1 and the pitching table 2 and this rigidity effect in the lock ring wearing state can be obtained from Equation 7. I can do it.

(2) Vehicle collision test process;
Next, the vehicle collision test process will be described.
This vehicle collision test process is performed using the white body 1, the pitching table 2, the pitching control / measurement device 5, the horizontal acceleration control / measurement device 6 and the simulation control device 7 shown in FIG. It is executed as shown by the solid line.

(2-1) Removal of load cell unit 3 with spring and load cell units 4a and 4b;
Remove the four load cell units 3 with a spring and the load cell unit 4a (4b) that were arranged between the pitching table 2 and the white body 1 and place the white body 1 directly on the pitching table 2 and a number of bolts and nuts. Fix with etc.
Even if there is a dummy doll (whether it is seated on the seat in the white body 1), the total mass, the total center of gravity position, and the total moment of inertia in that state can be tested and measured.

(2-2) Vehicle collision test implementation process;
When the preparation for the vehicle collision test is completed, the simulation controller 7 determines the target waveform input to the simulation controller 7 and the mass M, the center of gravity G, the pitching inertia moment I, etc. calculated in the above-described inertia moment identification step. The pitching input waveform to the pitching control / measurement device 5 and the horizontal direction input waveform to the horizontal acceleration control / measurement device 6 are calculated.

In this way, a pitching input waveform or a horizontal direction input waveform is output to the pitching control / measurement device 5 or the horizontal acceleration control / measurement device 6 based on a command from the simulation control device 7.
Then, the pitching table 2 on which the white body 1 is mounted is driven along a guide rail (not shown), and a vehicle collision test is performed.
At this time, the response waveform values of the tilt angle and the horizontal acceleration are controlled based on the mass M, the position of the center of gravity, and the pitching inertia moment I calculated in the above-described inertia moment identification step. Can be performed.

In addition, a dedicated measuring device for measuring the mass M of the white body 1, the position of the center of gravity G (the front horizontal distance Lf, the rear horizontal distance Lr, the center of gravity height H) and the pitching inertia moment I becomes unnecessary, and the vehicle collision test The mass M, the position of the center of gravity G, and the pitching moment of inertia I are measured simply by inserting the load cell unit 3 with a spring and the load cell units 4a and 4b between the pitching table 2 and the white body 1 can do.
And since the vehicle collision simulation can be performed by this simulation apparatus using the measured mass M, the position of the center of gravity G, and the pitching inertia moment I, it does not take time for pre-preparation and the equipment cost is low. Not only will the test be simplified.
Further, even when the white body 1 is processed and changed, it is possible to quickly measure the mass M, the position of the center of gravity G, the pitching inertia moment I, and the vehicle collision simulation.

  As mentioned above, although embodiment of this invention was described, it cannot be overemphasized that this invention is not limited to said embodiment, A various change may be added to the specific structure within the scope of the present invention. .

It is an outline | summary of the vehicle collision simulation apparatus with an inertia moment identification function which concerns on the 1st Embodiment of this invention. It is a side view of the load cell unit with a spring in FIG. 1, and a load cell unit. It is a side view of the other example of the load cell unit with a spring in FIG. 1, and a load cell unit.

Explanation of symbols

1 White body (test body)
2 Pitching Table 3 Spring Load Cell Unit 4a, 4b Load Cell Unit 5 Pitching Control / Measurement Device 6 Horizontal Acceleration Control / Measurement Device 7 Simulation Control Device 10 Upper Pedestal 11 Lower Pedestal 12 Load Cell 13 Compression Spring 14 Lock Ring Receipt 15 Lock Ring Support Hardware 16 Lock ring M Mass Lf Front horizontal distance of the center of gravity Lr Horizontal distance behind the center of gravity L Load cell distance Fr Back load measurement value Ff Front load measurement value Fri Inclination rear load measurement value Ffi Inclination front load measurement value G Center of gravity H Center of gravity height

Claims (5)

A pitching table mounted with a test body and swingable in the pitch direction;
A load cell unit with a spring and a load cell unit that can be interposed between the test body and the pitching table;
A horizontal acceleration control / measurement device for applying a horizontal acceleration to the pitching table;
A pitching control / measurement device that swings the pitching table in the pitch direction;
A simulation control device for transmitting a control signal to the horizontal acceleration control / measurement device and the pitching control / measurement device,
The simulation control device includes:
When the moment of inertia is identified, the test body is based on the load cell unit with spring and the load measurement value measured by the load cell unit by swinging the pitching table in the tilt and pitch directions via the pitching control / measurement device. Calculate the mass, center of gravity position and pitching moment of inertia of
During a vehicle collision test, a horizontal input waveform and a pitching input waveform are calculated based on a target waveform, the mass, the gravity center position, and the pitching inertia moment, and the horizontal input waveform is output to the horizontal acceleration control / measurement device, A vehicle collision simulation apparatus with an inertia moment identification function, which outputs the pitching input waveform to the pitching control / measurement apparatus.   The vehicle collision simulation apparatus with an inertia moment identification function according to claim 1, wherein a signal for swinging the pitching table in the pitch direction at the moment of inertia identification is a single pulse waveform.   3. The vehicle collision simulation with an inertia moment identification function according to claim 1, wherein the pitching table is provided on a slide base movably disposed along a guide rail so as to be pitchable. 4. apparatus. Using a vehicle collision simulation apparatus provided with a pitching table on which a test specimen is mounted and provided on a slide base movably disposed along a guide rail so as to be swingable in the pitch direction.
Inserting a load cell unit with a spring and the load cell unit between the pitching table and the test body,
Calculate the mass and center of gravity position of the specimen based on the load measurement value measured by the load cell unit with spring and the load cell unit by horizontally and tilting the pitching table,
An inertia moment identification method, wherein the pitching inertia moment is calculated based on a load measurement value measured by the spring-loaded load cell unit by swinging the pitching table. A guide rail and a slide base movably disposed along the guide rail;
A pitching table provided on the slide base so as to be swingable in the pitch direction and on which a test body is mounted,
A load cell unit with a spring and a load cell unit that can be interposed between the test body and the pitching table;
A horizontal acceleration control / measurement device for applying a horizontal acceleration to the pitching table;
A pitching control / measurement device that swings the pitching table in the pitch direction;
A simulation control device for transmitting a control signal to the horizontal acceleration control / measurement device and the pitching control / measurement device,
The slide base is slidably mounted on the guide rail,
Fixing the load cell unit with spring and the load cell unit on the pitching table;
Fixing the test body on the load cell unit with spring and the load cell unit;
Calculate the mass of the test body based on the load measurement value measured by the load cell unit with the spring and the load cell unit with the pitching table horizontal,
Inclining the pitching table to calculate the center of gravity position of the specimen based on the load measurement value measured by the load cell unit with a spring and the load cell unit,
A pitching inertia moment is calculated based on the load measurement value measured by the load cell unit with a spring and the mass and the position of the center of gravity by adding vibration of a single pulse waveform to the pitching table and swinging in the pitch direction.
Thereafter, the load cell unit with spring and the load cell unit are removed, and the test body is fixed on the pitching table,
A simulation method, wherein a vehicle collision test is performed by sliding the pitching table on which the test body is mounted and the slide base along the guide rail.

Images